MATERIALS HANDLING | MACHINERY Handle with care:
materials handling Advances in materials handling include a new range of air dryers, a common control platform for drying equipment and new ranges of conveyors, blenders and hopper loaders
The range of materials handling equipment is many and varied – as befits a class of equipment that must variously dry, mix and convey a wide range of raw materials. Motan says its Metro G Med hopper loaders are aimed at plastics processors in the medical and pharmaceutical industries. The units are based on its Metro G series of
material loaders for plastic granulate and meet strict hygiene requirements according to FDA 21 CFR. The company paid particular attention to process-safe use in the clean room. Strong stainless-steel material sieves inside the units, special filters with high-quality seals, and elec- tropolished stainless steel surfaces ensure reliable, and dust- and contamination-free operation. A highlight is the revised membrane implosion vacuum valve, which does not require compressed air and can operate inside strict cleanroom environments. An optional dedusting unit ensures high
material quality of the plastics to be processed. The dust removed from the material is sucked to the central filter with a filtered air flow and separated there. An implosion vacuum valve with HEPA H13 filter is installed as standard. After each conveying operation, an implosion cleans the stainless-steel material sieve.
While the standard implosion vacuum valve opens and closes pneumatically for this purpose, the optional membrane implosion vacuum valve uses the vacuum generated for the valve operation. This is an optimum prerequisite for installation in clean rooms. High-quality seals ensure a dust-free environment for all variants. The company also offers a variant mounted
directly on the feed throat of the processing machine. This machine loader – without an outlet flap – does not require a separate material hopper,
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Main image: Motan’s Metro G Med hopper loaders are aimed at medical and pharma applications
operates with a low material supply, and so reduces resi- dence time – making it appropri- ate for conveying hygroscopic
materials and where space is at a premium.
Thermal exchange At the recent Plast 2023 show in Italy, Moretto showed a number of its materials handling developments – including its OTX (original thermal exchanger) hopper. The OTX dehumidification hopper, developed using sophisticated mathematical simulations, ensures a regular flow of material – guaranteeing the correct drying of each individual granule being treated, says the company. In addition, optimisa- tion of process parameters has made it possible to reduce hopper size, technological airflow and treatment time by 40% for the same hourly throughput. The reduction in hopper size was made possible by the energy efficiency of OTX, which has been improved by 66% at the same production capacity. Because OTX is not a simple hopper – but a combi- nation of seven patents – it ensures high drying performance, says Moretto. The use of a smaller hopper also allows the use of a smaller dryer, it adds.
� October 2023 | PIPE & PROFILE EXTRUSION 11
IMAGE: MOTAN
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